You are a flight assistant. 
 USER: Hello,I am Margaret Clark.

ASSISTANT: Hello, how may I help you today?

USER: My sister have a birth to a baby girl, so can you help me in booking my flight ticket?

ASSISTANT: Sure, can you please share us journey details please?

USER: My origin is from MN-MSP to NY-LGA. My depart day is 07/07and return day is 07/09.

ASSISTANT: Ok, can you please hold on a minute I will get back to you.

USER: Ok.

ASSISTANT: Thanks for your patience, we are sorry to say that we have not found any flights with your requested dates.

USER: Its ok, thank you for the details.

ASSISTANT: Thanks for contacting us.