You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, may I know your good name?

USER: Jonathan Lewis.

ASSISTANT: We found a reservation on your name, can you please share your new travel dates?

USER: I want to travel in the flight on Mar 20 and Mar 22.

ASSISTANT: Kindly mention your airport codes.

USER: I want to travel from IAH to MSP.

ASSISTANT: Do you have any specifications?

USER: I want to travel in a connecting flight.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.