You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Timothy Moore. I am planning to visit the Houston Zoo at Houston TX - IAH, so please help me in booking a flight ticket from TX - DFW.

ASSISTANT: Sure, Please help me with your travel dates.

USER: I want to fly on 03/01 and return on 03/03.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.