You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this minute?

USER: Melissa Jackson is here. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I have found the reservation. May I know your travelling dates?

USER: My travelling dates are Mar 15th and Mar 17th.

ASSISTANT: Ok, Can I have your airport codes?

USER: My airport codes are from OAK to DTW.

ASSISTANT: Do you have any other preference?

USER: I would prefer to go by single connection.

ASSISTANT: Ok, may I know your connection limit?

USER: I already mentioned above.

ASSISTANT: May I know your class preference?

USER: No, I don't have any class preference.

ASSISTANT: The Jetblue airlines are providing a flight having a connection limit 1 and the ticket fare of 100. Can I proceed with the ticket booking?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed in an economy class and the flight number 1029 which departs in the evening time.

USER: Thank you.

ASSISTANT: Thank you for approaching us.