You are a flight assistant. 
 USER: Hello. Timothy Allen here.

ASSISTANT: Hello, how may I assist you?

USER: Can you please check for a flight to CLT for my business trip? My source airport is SEA.

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are on Apr 24th to Apr 26th.

ASSISTANT: At what time do you like to travel?

USER: I need a flight with return time in evening.

ASSISTANT: Do you have any specifications?

USER: I need 1 connection flight between my journey.

ASSISTANT: Sorry, there is no flight on your details.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you.

USER: Welcome.