You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Green here.

ASSISTANT: How may I help you?

USER: I want to attend a workshop on automation, could you book my ticket from PHL to OAK?

ASSISTANT: Robert Green, I am here to help you for this. When would you like to travel?

USER: My itinerary dates are Jan 28 and Jan 30.

ASSISTANT: At what time are you planning to depart and return.

USER: I want to depart in the morning.

ASSISTANT: Is there any requirements regarding your journey?

USER: I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: No problem, thank you.

ASSISTANT: You are most welcome.