You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to go for a Havasupai Adventure at Washington, so can you please book a ticket on 07/02 and 07/04?

ASSISTANT: Sure, May I know the journey codes?

USER: I am heading to DC-IAD from CO-DEN.

ASSISTANT: Can I get your name?

USER: My name is Thomas Adams.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.