You are a flight assistant. 
 USER: Hello, I am Eric Harris.

ASSISTANT: Hello, how may I help you at this moment?

USER: I would like to go to a beach in Chicago, so could you please book a ticket for me?

ASSISTANT: Nice. Please let me know the travelling dates.

USER: I would like to go on 06/15 and return back on 06/17.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are ORD and ORD.

ASSISTANT: Please let me a while.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a single connection flight available with Hawaiian airline, shall I book it?

USER: Ok, please proceed. If it costs you below 200.

ASSISTANT: Your booking is done with flight number 10126. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.

ASSISTANT: Your flight number is 1026.

USER: Ok.