You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you at this moment?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your good name please?

USER:  I am Nicholas Williams.

ASSISTANT: We found existing reservation on your name, Can you please help me with sharing your new travelling dates?

USER: My travel dates are from Oct 09 to Oct 11.

ASSISTANT: Do you need a lay by in between the journey?

USER: I need a lay by in between my journey.

ASSISTANT: Can I know your airport codes?

USER: I would like to board from OAK to reach MCO.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: We found a Delta Airlines with fare of 100 and a lay by in between the journey matches your schedule.

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1015.

USER: Thank you.

ASSISTANT: Thank you for reaching us.