Hello.
user
Hello. How can I assist you?
assistant
My name is Daniel Mitchell. I am planning to travel from DEN to IAH to attend my sister's wedding, could you please help me with booking a flight ticket?
user
Sure, on which date you are  planning to visit?
assistant
My journey dates are 10/28 and 10/30.
user
Sure, give me a minute.
assistant
Ok.
user
Sorry to say that there is no flight  found.
assistant
That's ok. Thank you for the information.
user
Thank you for contacting us.
assistant