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

ASSISTANT: Hello, how may I help you today?

USER: I would like to visit Seattle for a business meeting, can you please reserve a flight ticket from CLT to SEA?

ASSISTANT: Sure Allen, can you please share me with your dates of journey?

USER: Thank you, my departure is on Jan 29 and please book my return ticket also on Jan 31.

ASSISTANT: May I know your class preference please?

USER: No.

ASSISTANT: Please wait for a moment.

USER: I don't have any class preference, take your time.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: Oh! No issues. Anyways, thank you for the information.

ASSISTANT: You are welcome.