You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Lisa Wright. I am planning to travel from IAH to ORD.

ASSISTANT: Ok, can you please let me know your travelling dates?

USER: My travelling dates are 02/13 to 02/15.

ASSISTANT: I am sorry, I did not find any flights on your dates.

USER: Proceed for booking. That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.