You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please hold me a flight ticket from PHX to OAK?

ASSISTANT: Sure, I am willing to help you for this. Could you please share me your travel dates?

USER: My trip dates are 10/23 - 10/25.

ASSISTANT: May I know your name please?

USER: Helen Thomas here.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I need a business class.

ASSISTANT: Is there any other requirements?

USER: I prefer a normal - cost airline.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: No issues, thank you.

ASSISTANT: Thank you very much for contacting our agency.