You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My concert was postponed and I want to change my reservation, can you help me?

ASSISTANT: Sure, please may I know your name?

USER: My name is Scott Lewis.

ASSISTANT: Scott, share your new reservation details.

USER: Sure, my trip dates are 03/09 and 03/11.

ASSISTANT: Please share your airport codes?

USER: My airport codes are MCO to LAX.

ASSISTANT: There is no flight available, Scott.

USER: It's fine.

ASSISTANT: Thanks for reaching us . Have a nice day.

USER: Thank you for your assistance.