Hello.
user
Hello, how can I help you?
assistant
I want to change my existing reservation due to an emergency. Can you help me in changing reservation?
user
Sure, please provide me your name?
assistant
My name is Matthew Perez.
user
Please wait a minute.
assistant
Sure.
user
Sorry to say you that there are no flights with your specifications.
assistant
Ok, No problem. Thank you.
user
Thank you.
assistant