You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I am Rachel Hernandez. I am planning to book a ticket on 12/01 and return on 12/03, can you help me in booking?

ASSISTANT: Sure, may I know your airport codes of journey?

USER: I am departing from IAD to Phoenix PHX.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: There is a connecting flight with number 1020 in airline Delta, the fare is 100.

USER: Please proceed for booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.