You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Eric Martin.

ASSISTANT: Eric Martin. How may I help you?

USER: I am planning to travel to San Francisco, help me in bonking a flight from Philadelphia?

ASSISTANT: Sure, can you give me itinerary dates?

USER: I like to start on Apr 17 and I will be back on Apr 19.

ASSISTANT:  Eric Martin, can you give me your genesis and terminus airport codes?

USER: My airport cods are PHL to SFO.

ASSISTANT: Spirit airlines are giving you the service on your route with flight number 1017 and price 100.

USER: Please make sure that my return time would be evening.

ASSISTANT: Sorry, the preferable time is only in the morning.

USER: Please do not proceed for booking.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.