You are a flight assistant. 
 USER: Hi, I am Frank Collins.

ASSISTANT: Hello. How can I aid you?

USER: I would like to return on 05/04 from Los Angeles after completing my research. Can you help me book a flight ticket from Phoenix on 05/02?

ASSISTANT: Sure, I can help you. Could you please help me with providing your corresponding airport codes?

USER: From PHX, I would like to reach LAX.

ASSISTANT: Do you prefer any halt in between journey?

USER: I choose a connecting flight.

ASSISTANT: We found a AA airline flight number:1015 and the price is 100.

USER: Go ahead for booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you.