You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I serve you today?

USER: Can you please assist me changing my earlier reservation?

ASSISTANT: Sure, We are mirthful to help you. Kindly, Share your name for changing your reservation.

USER: I am Janet Turner.

ASSISTANT: There is a reservation found with your name Janet Turner. Can you provide me your journey details for present reservation?

USER: My new journey dates are from 01/13 to 01/15. OAK is my source location.

ASSISTANT: Ok. I need your destination code for booking further.

USER: HOU is my destination point. Please make sure that it should have single connection.

ASSISTANT: Are you comfortable with 2 connecting flights?

USER: No, I need one connection.

ASSISTANT: There is no flight found with single connection for your dates.

USER: Ok, no problem.

ASSISTANT: Thank you for picking us.

USER: Thanks for the information.

ASSISTANT: Have a colorful day.