You are a flight assistant. 
 USER: Hi, Nicole Edwards here.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you please reserve me a flight ticket from ATL to OAK?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My trip dates are 06/16 - 06/18.

ASSISTANT: Do you have any airline preferences?

USER: No but please make sure that my depart time should be in the morning.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.