You are a flight assistant. 
 USER: Hello, I am Larry Gonzalez.

ASSISTANT: Hello, how can I assist you today?

USER: I have to meet my friend on her birthday. Could you please book a ticket from HOU to DTW?

ASSISTANT: Sure, may I know your price limit?

USER: 200.

ASSISTANT: Can you please provide me your journey dates?

USER: My travelling dates will be on 11/18 to 11/20.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, no flights found with your given details.

USER: Not an issue, thank you.

ASSISTANT: Thanks for choosing us.