You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel to DCA for business trip, can you help me to reserve a flight ticket from SEA?

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

USER: Sure, my planned travelling dates are Jul, 17 and 19 respectively.

ASSISTANT: May I know your connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No, thank you for asking.

ASSISTANT: May I know your good name?

USER: Sure, my name is Edward Davis.

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

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.