You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to meet my uncle at Houston, please help me in booking my ticket.

ASSISTANT: Sure, please tell me your airport codes.

USER: My airport codes are from MCO to IAH.

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are from 06/30 to 07/02.

ASSISTANT: Ok, may I know your name please?

USER: My name is Amanda Robinson.

ASSISTANT: Amanda, all flight tickets are sold out.

USER: Ok, thank you for your information.

ASSISTANT: Thank you.