Hello.
user
 Hello, how may I oblige you today?
assistant
I am Jack Evans. Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.
user
Ok, please wait for a while.
assistant
Sure.
user
Your reservation found, so please give your details for further process.
assistant
My source and destination codes are IAD, IAH.
user
Sure, can you please share your journey dates that you prefer to travel?
assistant
I want to fly on Feb 02 and return on Feb 04.
user
Sorry to inform you that, currently no flights are running at that locations due to abnormal weather conditions.
assistant
Not an issue. Thank you.
user
Thank you for reaching us.
assistant