You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Matthew Garcia. I am planning to meet my friend at Houston, HOU. Could you please help me with booking a flight ticket from DTW?

ASSISTANT: Can you share your travelling dates please?

USER: My travelling dates are from Dec 08 to Dec 10.

ASSISTANT: May I know your destination code? Do you have any airline preference?

USER: I am comfortable with any airline.

ASSISTANT: How much price can you afford?

USER: I can afford up to 500.

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

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, there is no flight available according to your requirements.

USER: Ok, not an issue. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.