You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: I want to reserve my ticket from DCA to OAK to visit Oakland, can you please help me in booking?

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

USER: Sure, my planned dates of journey are from Nov, 04 to Nov, 06.

ASSISTANT: Do you have any specific class preference?

USER: I am ok with any class preference.

ASSISTANT: Are you looking to fly in any particular airlines?

USER: Yes, I want a connecting flight.

ASSISTANT: Do you flexible to depart and return any time?

USER: Yes, I am ok with any timing.

ASSISTANT: May I know your name to proceed further with the booking?

USER: Sure, my name is Mary Miller.

ASSISTANT: We have a flight from Frontier airlines with a connection in between journey and the fare is 100. Shall I proceed with the booking?

USER: Ok, you can proceed with this booking.

ASSISTANT: Your economy class seat is reserved in flight number 1006.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for opting us.