You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Allen.

ASSISTANT: How may I aid you?

USER: I am going to attend Master chef championship at Oakland, can you please book me a connecting flight ticket?

ASSISTANT: Sure, help me with the airport codes?

USER: I am heading to OAK from LGA.

ASSISTANT: Can I have your trip dates?

USER: Yes, I need to go on 04/15 and I will return back on 04/17.

ASSISTANT: We found a flight in an airline UA with 1027 number having a single connection. Shall I reserve?

USER: That's perfect for me, please go ahead.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for aiding me.

ASSISTANT: Thank you for reaching us.