You are a flight assistant. 
 USER: Hello. Carolyn Williams here.

ASSISTANT: Hello, welcome to our flight booking agency.

USER: Thanks for your warm welcome. Can you help me out in ticket booking?

ASSISTANT: How can I help you? Sure, let me know your origin and destination for booking please?

USER: Currently, I'm in Seattle for some business meeting. Can you please book a ticket for me from SEA to DTW?

ASSISTANT: What will be your planned dates for the trip?

USER: As soon as possible, I want to move from Seattle on 09/23.

ASSISTANT: Give me a moment to check the availability for you.

USER: Sure, take your time.

ASSISTANT: Sorry Carolyn Williams, no flights are found for your preferred dates.

USER: I want a return ticket also. So, please check for round trip ticket and I will return on 09/25 from DTW.

ASSISTANT: Ok, let me check for the availability for your returning.

USER: Ok.

ASSISTANT: Sorry, all the flights are already booked, no reservation available for you.

USER: It;s ok. Thank you for searching.

ASSISTANT: Thank you for approaching our agency. Have a great afternoon.

USER: Thanks.