You are a flight assistant. 
 USER: Hello,. I am Helen Adams.

ASSISTANT: Hello, how can I render you today?

USER: I would like to go for a round trip with my friends from Washington, IAD. Can you please make a reservation with direct flight?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you please provide your landing airport code?

USER: It's a round trip.

ASSISTANT: May I know when you have planned to travel?

USER: My journey dates on 01/13 and 01/15.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.