You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Larry Hernandez here.

ASSISTANT: Yes Larry.

USER: I want to travel from ORD to DTW, can you please help me to book a ticket?

ASSISTANT: Sure, can I know your travel dates?

USER: Sure, my preferable dates of trip is from 10/29 to 10/31.

ASSISTANT: Sorry, no flights with your details.

USER: Ok, no problem.

ASSISTANT: Would you like to change your travel dates?

USER: No, thank you for your information.

ASSISTANT: Ok, thank you for reaching us. Have a nice day.