You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Robert Thomas here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking the ticket from DCA to OAK? As I'm planning to attend a interview over there.

ASSISTANT: Ok, may I know your travelling dates?

USER: My journey dates are 07/23 and 07/25.

ASSISTANT: There is a flight ticket with Delta airline and 100 as fare with 1 connection flight.

USER: That's fine, please proceed for booking.

ASSISTANT: Ok, your ticket is confirmed with 1000 flight  number.

USER: Thank you so much.

ASSISTANT: Most welcome.