You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please make a reservation with the name of Brenda Harris from Washington.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your take off and landing airport codes?

USER: I am heading to SEA from IAD.

ASSISTANT: Could you please share your planned journey dates?

USER: I have planned to travel on Mar 26 and return on Mar 28.

ASSISTANT: Let me know your connection preference.

USER: I am looking for a flight with one connection.

ASSISTANT: Which class would you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Is there any time concern?

USER: I want to depart in the evening.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: I am sorry to inform you that, there were no flights available that matches your preferences.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for approaching us.