You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I have to change my reservation which I have done earlier to organize an event but suddenly it got postponed so please help me with that.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: Sure, please check the reservation with the name of Lisa Miller.

ASSISTANT: I have found your reservation. Can you please mention your airport code names?

USER: That's great, I would like to travel from OAK to EWR now.

ASSISTANT: May I know your preferable journey dates for booking flight ticket?

USER: Sure, my changed travel dates will be 10/23 and 10/25.

ASSISTANT: Ok, just hold on a moment, I will check flight availability.

USER: Sure, I will wait for your response.

ASSISTANT: There is a flight available as per your requested dates, airline is Hawaiian and flight number is 1003. Shall I proceed?

USER: That's perfect, please go with booking.

ASSISTANT: Your flight ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, happy journey.

USER: Most welcome.