You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: I am Larry Lopez. Can you please reserve me a flight ticket from Dallas & Fort Worth, TX - DFW to Houston, TX - HOU?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My trip dates are 09/09 - 09/11.

ASSISTANT: How much can you afford for this particular plane ticket?

USER: I can afford up to 200 only.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: There is no flight available matching with your requirements.

USER: Not a problem, thank you.

ASSISTANT: Thank you.