You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am looking for a flight from IAD to IAH, can you help me in booking?

ASSISTANT: Sure, I am happy to help you. May I know your travelling dates, please?

USER: Sure, my planned travel dates are May 01 and May 03.

ASSISTANT: Do you have any connection limit?

USER: Please look for a direct flight.

ASSISTANT: May I know your class preference for your journey?

USER: No, I'm fine with any class that you provide.

ASSISTANT: Let me know about your other specifications, if any.

USER: No, thank you.

ASSISTANT: Can I know your name to proceed further for documentation purpose?

USER: Sure, myself Catherine Lewis.

ASSISTANT: Sorry, there are no flights found on your specified routes. Thank you for reaching us.

USER: Ok, thank you for the information.

ASSISTANT: My pleasure.