You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Benjamin Jones. My family tour trip got postponed, so I want to change an existing reservation.

ASSISTANT: Sure, Please wait a minute.

USER: OK.

ASSISTANT: We have found a reservation on your name, Please help me with your new reservation details.

USER: My source is Houston, TX - HOU and destination is Minneapolis, MN - MSP.

ASSISTANT: Please help me with your travel dates.

USER: I would like to fly on 05/11 and return on 05/13.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.