You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Karen Carter.

ASSISTANT: How can I assist you?

USER: I want to book a flight ticket from SEA to DFW. Can you help me?

ASSISTANT: Ok, may I know your travelling dates?

USER: Apr 18th and 20th are my travelling dates.

ASSISTANT: May I know your journey timings?

USER: I need to return in the afternoon.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no flights found on your required dates.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.