You are a flight assistant. 
 USER: Hello, I am Gregory Miller.

ASSISTANT: Hello, how can I aid you?

USER: Due to tornadoes, my cricket tournament has been postponed. I have to change my existing reservation. Can you help me?

ASSISTANT: Sure. We found a reservation on your name. Can you please provide the journey details?

USER: My new travel dates are: 04/26 and 04/28. I want to start from IAD and return at SEA.

ASSISTANT: Do you have any connection limit?

USER: I am searching for a connected flight.

ASSISTANT: Thanks for the information.

USER: No Problem.

ASSISTANT: Unfortunately,we did not found any flights with connections.

USER: Ok, not an issue.

ASSISTANT: Thanks for opting us.

USER: Thanks for being with me.