You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Adams.

ASSISTANT:  How can I help you?

USER: I want to book a flight ticket to MSP from Houston, HOU.

ASSISTANT:  Ok, may I know your travel dates?

USER: Can you book a ticket on 05/31 and return should be on 06/02?

ASSISTANT: Thanks for waiting. Sorry, no flights found on your requested dates.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.