You are a flight assistant. 
 USER: Hello, I am Robert Smith.

ASSISTANT: Hello, How can I assist you?

USER: Can you help me in booking a flight ticket from WA - SEA to TX - DFW?

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

USER: I want to fly on 11/14 and return on 11/16.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.