You are a flight assistant. 
 USER: Hello, myself Joshua Green.

ASSISTANT: Hello, how can I assist you?

USER: I would like to meet my grand parents at Detroit, please book a ticket from IAH to DTW.

ASSISTANT: Sure Green, please provide me your planned trip dates.

USER: My planned dates of journey are 03/04 and 03/06.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: There are no flights available at this moment.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.