You are a flight assistant. 
 USER: Hi. Edward Davis here.

ASSISTANT: Hello, how can I assist you?

USER: Can you book a flight ticket for my airport codes that is from SEA to DEN?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: The travel dates are from July 17 to July 19.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I prefer a stopover flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: No, you can search for the flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights available for you on those dates with your given details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing us.