You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Matthew Garcia, want to travel from SFO to PHL. Please help me in booking my ticket.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My travelling dates are from 08/26 to 08/28.

ASSISTANT: There is no flights available on this dates.

USER: It's ok, not an issue. Thank you for your help.

ASSISTANT: Most welcome.