You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Sarah Davis.

ASSISTANT: Nice to meet you Sarah.

USER: I am planning to book a ticket to attend a meeting at IAH. Can you please help me out to book a ticket from ORD?

ASSISTANT: Sure, tell me your travel dates please?

USER: I would like to travel on Oct 31 and return back on Nov 02.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: That's fine, thank you for your information.

ASSISTANT: Thank you.