You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Patricia Green.

ASSISTANT: Nice to meet you Green.

USER: Can you please help me to book a flight ticket from LGA to HOU?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are from 08/09 to 08/11.

ASSISTANT: Do you have any price limit?

USER: My price limit is 200.

ASSISTANT: Thanks for your details, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform that, there is no flights found on your given routes.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for reaching us, have a nice day.