You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to attend live music concert at San Francisco, can you please reserve a flight ticket from PHL to SFO?

ASSISTANT: Can I know your travelling dates?

USER: Sure, my planned travelling dates are Feb, 12 and 14 respectively.

ASSISTANT: Ok. Do you have any preferences?

USER: Flight has to be with single connection.

ASSISTANT: Would you like to fly with business class or economy class?

USER: I am comfortable to travel in any class.

ASSISTANT: Please let me know your name?

USER: Sure, my name is Benjamin Thompson here.

ASSISTANT: Sorry, no flights are available for your requirement.

USER: Ok, not an issue.Thank you for information.

ASSISTANT: Thank you.