You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket from Washington to attend a wedding. Can you help me with the booking?

ASSISTANT: Sure, may I know your airport codes?

USER: My journey is from IAD to DCA.

ASSISTANT: When your willing to travel?

USER: I would like to travel on 09/29 and 10/01.

ASSISTANT: Do you have any specification?

USER: I prefer a connecting flight within my journey.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1025. Shall I book this ticket?

USER: Book my ticket with this airline.

ASSISTANT: On which name would like to book it?

USER: My name is Raymond White.

ASSISTANT: Your ticket was processed.

USER: Thank you for the help.

ASSISTANT: Thank you so much.