You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sarah Garcia here.

ASSISTANT: How may I help you today?

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

ASSISTANT: Sure, let me know your travel dates please?

USER: The travel dates are from 12 Aug to 14 Aug.

ASSISTANT: Do you have any specific arrival and depart timings?

USER:  I would like to depart in the afternoon time.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any airline preference?

USER: That does not matter.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: That is not a problem. Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.