You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to meet my grandfather as he is unwell, can you please book my flight ticket from CLT to DEN?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will depart on July 28th and return back in the morning on July 30th.

ASSISTANT: May I know your connection limit?

USER: I need a flight having single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: My name is Brian Baker.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.