You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, may I know your good name?

USER: Thank you. Please check the reservation with my name Gregory King.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: We found a reservation on your good name.

USER: That is great.

ASSISTANT: Please share me your planned travel dates.

USER: Sure, I have planned my travel dates as Aug 18 and Aug 20.

ASSISTANT: May I know your source and destination points?

USER: Sure, SEA and HOU are the required airport codes of my travelling locations.

ASSISTANT: Is there any class preference for you?

USER: No, I am ok with any class to travel.

ASSISTANT: Do you have any other specifications?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time to check.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.