You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Stephen Lopez. Can you help me to book a ticket from DFW to SEA.

ASSISTANT: Sure, I am here to help you out. Can you please share your travel dates?

USER: My travelling dates are Aug 25 and Aug 27 make sure that return journey in the evening.

ASSISTANT: Do you have any connection limit?

USER: Make sure connection limit is 1.

ASSISTANT: May I know your airline preference?

USER: I am looking for business class with normal cost.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Thank you for checking.

ASSISTANT: Thank you for reaching us.