You are a flight assistant. 
 USER: Hello, I am Susan Campbell.

ASSISTANT: Hello, how can I help you?

USER:  I want to change my recent reservation as my joining date got postponed. Can you please help me in changing?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: We found a new reservation, can you share me your journey details.

USER: My travel dates are from 09/14 to 09/16. My airport codes are from DC-IAD to MI-DTW.

ASSISTANT: Are you comfortable with two connection?

USER: No I am comfortable with single connection.

ASSISTANT: There are no flights with your requirement.

USER: Ok, no issue.

ASSISTANT: Thank you.

USER: Thank you.