You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from IAH to IAD?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My planned travel dates are Aug 18-20.

ASSISTANT: May I know your name?

USER: Myself, Samuel Walker.

ASSISTANT: Do you have any other specifications?

USER: I prefer to fly in connected flight.

ASSISTANT: Ok, wait for some time.

USER: I want to return in the afternoon. Ok.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thanks for approaching us.