You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Amy Lee.

ASSISTANT: Ok Amy, how can I be a help for you?

USER: Actually all of my friends planned to attend a music concert in Houston, but due to bad weather in Houston, the concert is postponed to other dates.

ASSISTANT: Ok, so would you like me to change your dates of travel?

USER: Yes, please help me out.

ASSISTANT: Ok, please give me a minute so that I can check the status of your existing reservation.

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any ticket booked with your name.

USER: That's fine.

ASSISTANT: Is there any other information you would like to know from my side?

USER: No, thank you for your time.

ASSISTANT: Thank you, have a great day.