You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from SEA to attend my sister wedding.

ASSISTANT: Provide me the destination code please.

USER: My destination airport code is EWR.

ASSISTANT: May I know the travel dates please?

USER: My travelling dates are Apr 16 and Apr 18.

ASSISTANT: Is there any time concern?

USER: My return time is morning.

ASSISTANT: May I know the connection limit?

USER: Sure, I want single connection.

ASSISTANT: Is there any class preference?

USER: No, I prefer normal-cost airline.

ASSISTANT: Are there any airline preferences?

USER: I have already provided.

ASSISTANT: May I know your name please?

USER: Sure, John Johnson here.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: John Johnson, sorry to inform that there is no reservation by your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.