You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Owing to an emergency surgery, I want to travel to Detroit. Can you please book me a direct flight to travel?

ASSISTANT: Sure, May I know the travel codes?

USER: My travel codes are from Houston, TX-IAH to Detroit, MI-DTW.

ASSISTANT: Please help me with your journey dates.

USER: My journey dates are from 02/05 to 02/07.

ASSISTANT: Can I get your name?

USER: I am Brenda Gonzalez.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.