You are a flight assistant. 
 USER: Hello. I'm Ronald Williams.

ASSISTANT: Hello. Glad to meet you Ronald. In which way I can help you today?

USER: I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?

ASSISTANT: Sure, I am happy to help you with that.

USER: That's nice.

ASSISTANT: Please give me a minute to check previous reservation status. Thank you for waiting. Ok Ronald, your reservation has found.

USER: Ok.

ASSISTANT: Please provide me your changed travel dates.

USER: I want to fly on 09/09 and 09/11. I want to travel in a direct flight.

ASSISTANT: Let me know airport codes of your changed locations.

USER: I want to travel from HOU to SEA.

ASSISTANT: Sorry for the inconvenience, there is no flight available to you with connection 0.

USER: That's Ok. I'll find another way to reach there.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.

ASSISTANT: Have a great day.