You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Elizabeth Campbell. Can you help me booking a flight ticket from IAH to MCO?

ASSISTANT: Sure, I will do that for you. Please help me with your travel dates.

USER: I will start on Apr, 27 and return on Apr, 29.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome and thank you for contacting us.