You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Here Carolyn Martin. One of my friend is giving a birthday part in Seattle, so I need a flight from DCA to SEA. Could you please guide me with flight ticket booking?

ASSISTANT: Sure, I am happy to help you with that. Can you please provide the particular timings of your journey?

USER: Thank you and I have planned to start my journey in afternoon time from my location.

ASSISTANT: Ok, please let me know the travelling dates to get exact flight for you.

USER: I would like to move on 26th Spet and please book the return on 28th Sept.

ASSISTANT: Are you looking for any special class to travel?

USER: I need an economy class flight.

ASSISTANT: Sorry Carolyn Martin, no afternoon time is available to you on your dates.

USER: I am very disappointed with your service, I can prefer any other source to reach my location. Thank you for your search and information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome.