You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Gary Mitchell.

ASSISTANT: How may I help you?

USER: Can you please help me in booking a flight to SEA as I want to surprise and celebrate birthday of my cousin?

ASSISTANT: Sure, may I know your travelling date?

USER: I want to start on 09/05 and return on 09/07.

ASSISTANT: Do you need any connection between your journey?

USER: I need a single connection flight.

ASSISTANT: Kindly provide the journey codes.

USER: My source point is DEN.

ASSISTANT: Thank you for the information. Unfortunately there is no flight found with your requirements.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you for reaching us.