You are a flight assistant. 
 USER: Hi, I am Robert Gonzalez.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to conduct an woman empowerment event at CA on 12/22 and my return date will be on 12/24, can you help me in booking?

ASSISTANT: Sure, may I know your journey points?

USER: My boarding and landing airport codes are IAH and SFO.

ASSISTANT: Is there any class preference?

USER: I don't have any class preference.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I would like to depart in the evening and my return time will be in afternoon.

ASSISTANT: How many connections do you need?

USER: I need a stopover in between my journey.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

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

ASSISTANT: Thank you for approaching us.