You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Eric Martinez is my brother, can you help me to book a flight ticket on his name from CA - SFO to TX - AUS?

ASSISTANT: Sure, I can help you. May I know your brother's itinerary dates?

USER: Ok, please book for the dates 07/27 and 07/29 respectively.

ASSISTANT: Please give me a moment to check for available flights.

USER: Ok, I will wait not a problem.

ASSISTANT: Do you have any specifications?

USER: Yes, please book a connecting flight.

ASSISTANT: Let me check. Sorry, no connecting flight is available on your planned dates.

USER: That's ok, thank you for checking the flights.

ASSISTANT: Eric, thank you for contacting us.